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US 12,668,741 B2Granted
Europium activating beta-type sialon phosphor, and light-emitting device
AssigneeDenka Company Limited
InventorsNoriyoshi Sakai, Ryousuke Kondo, Tomohiro Nomiyama, Keita Kobayashi
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Abstract
An europium activating β-type sialon phosphor contains at least one kind of element selected from the group made of yttrium, titanium, and gadolinium, wherein the total content of the at least one kind of element is more than 0 ppm and less than 1000 ppm.
Claims13
A europium activated β-type sialon phosphor, comprising:
- at least one kind of element selected from the group consisting of yttrium, titanium, and gadolinium,
- wherein a total content of the at least one kind of element is more than 0 ppm and less than 1000 ppm, and
- an absorptance with respect to excitation light with a wavelength of 600 nm is 6% or less.
A europium activated β-type sialon phosphor, comprising:
- an alkaline earth metal element,
- wherein a total content of the alkaline earth metal element is more than 0 ppm and less than 1000 ppm.
Dependencies are inferred from the claim text.